<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>区块链认证</title>
    <style>
      html,
      body {
        width: 100%;
        height: 100%;
        padding: 0;
        margin: 0;
      }
      .block-chain {
        width: 100vw;
        height: 100%;
        position: relative;
      }
      .block-chain .back {
        top: 3%;
        position: absolute;
        width: 100%;
        height: 50px;
        z-index: 10;
        cursor: pointer;
      }
      .block-chain-img {
        width: 100vw;
        top: 0%;
        position: absolute;
      }
    </style>
  </head>
  <body>
    <div class="block-chain">
      <div class="back"></div>
      <img class="block-chain-img" src="./assets/blockchain/blockchain.png" />
    </div>
  </body>
  <script type="text/javascript">
    window.onload = () => {
      const back = document.querySelector('.back');
      const backClick = () => {
        window.open(`${window.location.origin}/product-carbon-certification.html`);
      };
      back.addEventListener('click', backClick, false);
    };
  </script>
</html>
